Hot Wallet
A hot wallet is a Bitcoin wallet where the private keys are stored on an internet-connected device. It provides convenience for frequent transactions but exposes keys to online threats like malware, phishing, and remote hacking.
How It Works
A hot wallet stores your private keys on a device connected to the internet — typically a smartphone app or desktop application. When you want to send bitcoin, the wallet signs the transaction immediately using the locally stored keys. There is no separate signing device, no air gap, and no additional verification step beyond what the software provides.
The convenience of hot wallets makes them suitable for daily spending. Mobile wallets for buying coffee, paying for services, or sending small amounts to friends are legitimate use cases. Think of a hot wallet like the cash in your physical wallet — enough for daily needs, not your life savings. The security model is fundamentally weaker than cold storage, and no amount of software hardening fully compensates for the basic reality that keys on an internet-connected device are at risk.
For practical use, keep your hot wallet balance to an amount you would be uncomfortable but not devastated to lose. Replenish it from cold storage as needed. Use a hot wallet with open-source code, and on a device you keep updated and free of sketchy apps. Never install a hot wallet on a jailbroken phone or a computer used for downloading random software from the internet.
Key Points
- Private keys stored on an internet-connected device for convenience
- Suitable for small, daily spending amounts — not for savings
- Vulnerable to malware, phishing, keyloggers, and remote exploits
- Treat like cash in a physical wallet — only carry what you need
- Replenish from cold storage; never keep significant holdings in a hot wallet